Specifications

5-6
Catalyst 2970 Switch Software Configuration Guide
78-15462-03
Chapter 5 Clustering Switches
Planning a Switch Cluster
Figure 5-1 Discovery Through CDP Hops
Discovery Through Non-CDP-Capable and Noncluster-Capable Devices
If a cluster command switch is connected to a non-CDP-capable third-party hub (such as a non-Cisco
hub), it can discover cluster-enabled devices connected to that third-party hub. However, if the cluster
command switch is connected to a noncluster-capable Cisco device, it cannot discover a cluster-enabled
device connected beyond the noncluster-capable Cisco device.
Figure 5-2 shows that the cluster command switch discovers the switch that is connected to a third-party
hub. However, the cluster command switch does not discover the switch that is connected to a
Catalyst 5000 switch.
Figure 5-2 Discovery Through Non-CDP-Capable and Noncluster-Capable Devices
Si
Command switch
Member
switch 10
Member
switch 8
Member
switch 9
VLAN 62
Edge of
cluster
VLAN 16
86884
Switch 11
candidate
switch
Candidate
switches
Switch 12
Switch 13
Switch 14
Switch 15
Si
Si Si
Si
Si
Command switch
Catalyst 5000 switch
(noncluster-capable)
Third-party hub
(non-CDP-capable)
Candidate switch Candidate switch
89377